Determination of the spectroscopic stellar parameters for 257 field giant stars

dc.contributor.authorAlves, S
dc.contributor.authorBenamati, L
dc.contributor.authorSantos, N. C
dc.contributor.authorAdibekyan, V. Zh
dc.contributor.authorSousa, S. G
dc.contributor.authorIsraelian, G
dc.contributor.authorMedeiros, José Renan de
dc.contributor.authorLovis, C
dc.contributor.authorUdry, S
dc.date.accessioned2020-05-31T20:20:39Z
dc.date.available2020-05-31T20:20:39Z
dc.date.issued2015
dc.description.resumoThe study of stellar parameters of planet-hosting stars, such as metallicity and chemical abundances, help us to understand the theory of planet formation and stellar evolution. Here, we present a catalogue of accurate stellar atmospheric parameters and iron abundances for a sample of 257 K and G field evolved stars that are being surveyed for planets using precise radial-velocity measurements as part of the Coralie programme to search for planets around giants. The analysis was done using a set of high-resolution and high-signal-to-noise Ultraviolet and Visible Echelle Spectrograph spectra. The stellar parameters were derived using Fe I and II ionization and excitation equilibrium methods. To take into account possible effects related to the choice of the lines on the derived parameters, we used three different iron line-list sets in our analysis, and the results differ among themselves by a small factor for most of stars. For those stars with previous literature parameter estimates, we found very good agreement with our own values. In the present catalogue, we are providing new precise spectroscopic measurements of effective temperature, surface gravity, microturbulence, and metallicity for 190 stars for which it has not been found or published in previous articlespt_BR
dc.identifier.citationALVES, S. ; BENAMATI, L. ; SANTOS, N. C. ; ADIBEKYAN, V. Z. ; SOUSA, S. G. ; ISRAELIAN, G. ; MEDEIROS, J. R de. ; LOVIS, C. ; UDRY, S. . Determination of the spectroscopic stellar parameters for 257 field giant stars. Monthly Notices of the Royal Astronomical Society, v. 448, p. 2749-2765, 2015. Disponível em: https://academic.oup.com/mnras/article/448/3/2749/1110613. Acesso em: 26 Maio 2020. https://doi.org/10.1093/mnras/stv189 .pt_BR
dc.identifier.doi10.1093/mnras/stv189
dc.identifier.urihttps://repositorio.ufrn.br/jspui/handle/123456789/29103
dc.languageenpt_BR
dc.publisherOxford University Presspt_BR
dc.subjectObservational – techniquespt_BR
dc.subjectSpectroscopic – catalogues – starspt_BR
dc.subjectFundamental parameters – starspt_BR
dc.subjectLate-typept_BR
dc.titleDetermination of the spectroscopic stellar parameters for 257 field giant starspt_BR
dc.typearticlept_BR

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